Condensed Consolidated Statements of Stockholders' Equity (unaudited) - USD ($) shares in Millions, $ in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment [Member]	Common Stock [Member]	Paid-in Capital [Member]	Retained Earnings [Member]	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Treasury Shares [Member]	Noncontrolling Interest [Member]
Balance at Dec. 31, 2019	$ 12,392.8		$ 3.1	$ 8,920.1	$ 10,427.3		$ (241.9)	$ (6,720.5)	$ 4.7
Balance, shares at Dec. 31, 2019			309.9					(103.9)
Net earnings (loss)	(717.3)				(715.1)				(2.2)
Other comprehensive income (loss)	(23.9)						(23.9)
Cash dividends declared	(99.3)				(99.3)
Stock compensation plans	94.7			93.9	0.2			$ 0.6
Stock compensation plans, shares			0.8					0.1
Balance at Jun. 30, 2020	11,643.9	$ (3.1)	$ 3.1	9,014.0	9,610.0	$ (3.1)	(265.8)	$ (6,719.9)	2.5
Balance, shares at Jun. 30, 2020			310.7					(103.8)
Balance at Mar. 31, 2020	11,882.7		$ 3.1	8,984.3	9,866.2		(255.1)	$ (6,719.9)	4.1
Balance, shares at Mar. 31, 2020			310.6					(103.8)
Net earnings (loss)	(208.2)				(206.6)				(1.6)
Other comprehensive income (loss)	(10.7)						(10.7)
Cash dividends declared	(49.7)				(49.7)
Stock compensation plans	29.8		$ 0.1	29.7	0.1
Balance at Jun. 30, 2020	11,643.9	$ (3.1)	$ 3.1	9,014.0	9,610.0	$ (3.1)	(265.8)	$ (6,719.9)	2.5
Balance, shares at Jun. 30, 2020			310.7					(103.8)
Balance at Dec. 31, 2020	12,199.4		$ 3.1	9,121.6	10,086.9		(297.8)	$ (6,719.6)	5.2
Balance, shares at Dec. 31, 2020			311.4					(103.8)
Net earnings (loss)	340.2				340.0				0.2
Other comprehensive income (loss)	10.8						10.8
Cash dividends declared	(100.0)				(100.0)
Stock compensation plans	132.9			127.0	4.1			$ 1.8
Stock compensation plans, shares			1.1
Balance at Jun. 30, 2021	12,583.3		$ 3.1	9,248.6	10,331.0		(287.0)	$ (6,717.8)	5.4
Balance, shares at Jun. 30, 2021			312.5					(103.8)
Balance at Mar. 31, 2021	12,449.8		$ 3.1	9,199.2	10,237.7		(276.7)	$ (6,718.3)	4.8
Balance, shares at Mar. 31, 2021			312.2					(103.8)
Net earnings (loss)	142.5				141.9				0.6
Other comprehensive income (loss)	(10.3)						(10.3)
Cash dividends declared	(50.0)				(50.0)
Stock compensation plans	51.3			49.4	1.4			$ 0.5
Stock compensation plans, shares			0.3
Balance at Jun. 30, 2021	$ 12,583.3		$ 3.1	$ 9,248.6	$ 10,331.0		$ (287.0)	$ (6,717.8)	$ 5.4
Balance, shares at Jun. 30, 2021			312.5					(103.8)